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1
NDA 2019 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
In the given velocity (v) versus time (t) graph, accelerated and decelerated motions are respectively represented by line segments

Image
A
CD and BC
B
BC and AB
C
CD and AB
D
AB and CD
2
NDA 2019 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
Which one of the following statement regarding a thermo flask is not correct?
A
The walls of flask are separated by vacuum and made of glass which is a poor conductor of heat.
B
The glass walls themselves have shiny surfaces.
C
The surface of inner wall radiates good amount of heat and the surface of outer wall absorbs some of the heat that is radiated from the inner wall.
D
The cork supports are poor conductors of heat.
3
NDA 2019 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
Black hole is a
A
huge black star which has zero acceleration due to gravity on its surface.
B
star which has moderate acceleration due to gravity on its surface.
C
star which has collapsed into itself and has large acceleration due to gravity on its surface.
D
star which has collapsed into itself and has zero acceleration due to gravity on its surface.
4
NDA 2019 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
The formula for conversion between Fahrenheit and Celsius is $$^\circ$$F = X + (1.8 $$\times$$ $$^\circ$$C).
A
32
B
22
C
98
D
42
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